Heat olive oil in a pan.
Add green chillies and sauté for half a minute. Add cumin seeds and when they begin to change colour, add onions and sauté till golden brown.
Add ginger paste and garlic paste and sauté for a minute. Add tomatoes and salt. Cover and cook on low heat for two to three minutes.
Add red chilli powder, coriander powder and turmeric powder and continue to cook for another minute.
Add minced mutton, sauté for two minutes, add half a cup of water, stir and cover and cook on medium heat for fifteen to twenty minutes till the mutton is done, water has evaporated and oil surfaces on top.
Stir in the peas and garam masala powder and cook for a minute. Serve hot garnished with coriander leaves and lemon wedges.